BoilerFaultCodes Neon 11 High
Boiler Fault Code Neon 11
Also written as NEON11 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Neon 11 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected a problem with the internal thermometer that monitors your radiators, causing the system to stop working to avoid overheating. (As reported on Baxi Bahama 80e / 105e)
Pick your boiler brand for the Neon 11 fix
Source
Information for the Neon 11 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026